Dvd's wont play in dvd player

using any burn software to make a dvd i always get back disc will not play in this region. i do use good quality dvd’s since this is a new problem and i have’nt done any real changes to the computer. i know its software since i have even gone as far as deleteing all software for burnung and reinstalling it as well as putting in a new burner. what could it be?
The Olin

I had the same problem, but for me it was the discs

Use the DVD-R disk is more compatable. Also try to restore your system to a month ago that might solve the problem.